。
She said she was a little tired.
Literal
She [topic-は] a-little tired [quotative-と] said.
A direct quote construction: 少し疲れた ('I'm a little tired') is quoted with と and reported with 言った ('said'). 疲れた is the past tense of 疲れる ('to get tired'), but it describes a current state — a common pattern where the past form of a change-of-state verb means 'is now in that state.'